Axle fixture for heat dissipation fan and method of manufacture thereof

ABSTRACT

The present invention is an axle fixture for heat dissipation fan and a method of manufacture thereof, comprising steps of the followings: obtaining a shell with an axle at center where a depression is deposed on the bottom with several rabbets which are not connected to the axle; providing a lower mold with a platform and a concave where the shell is covered on the platform and the concave is corresponding to the rabbets; obtaining an upper mold with sprue to cover on the shell where the sprue is corresponding to the concave but not to the axle; and pouring a fixing agent from the sprue into the concave with the guidance of the rabbets so that the axle can be firmly fixed at the center of the shell after the fixing agent is solidified. In this way, an axle fixture can be easily manufactured and the cost can be reduced while the axle can be firmly fixed at the center of the shell.

FIELD OF THE INVENTION

The present invention relates to a fixture; more particularly, relates to an axle fixture which can be easily manufactured and the cost can be reduced and the axle can be firmly fixed at the center of a shell.

DESCRIPTION OF THE RELATED ART

An axle fixture for heat dissipation fan according to a prior art, as shown in FIG. 7, comprises a shell 5 having a hollow container 51, where a fixture 52 of copper is deposed at the center of the shell 5, a hole 53 is at the center of the fixture 52, a press-and-bond member 54 is at an end of the fixture 52, and an axle 55 is put in the hole 53 of the fixture 52. A mold is obtained to but in the hollow container 51 of the shell 5 and a pressing device is corresponding to the press-and-bond member 54 at an end of the fixture 52 to offer an outside force. As a result, the fixture 52 is pressed to form a plat and smooth surface by the press-and-bond member 54 at an end of the fixture 52 while riveting the fixture 52 and the axle 55 at the center of the shell 5 (as shown in FIG. 8). By doing so, an axle fixture for heat dissipation fan is obtained.

Although the method of manufacture according to the prior art can rivet the fixture 52 and the axle 55 at the center of the shell 5, the cost is high owing to that the fixture 52 is made of copper. And, while pressing the press-and-bond member 54 to rivet the fixture 52 and the axle 55 at the center of the shell 5, the force applied on the press-and-bond member 54 for pressing can be uneven so that the axle 55 after pressing may be slanted and may be waving on using.

SUMMARY OF THE INVENTION

Therefore, the main purpose of the present invention is to easily manufacture an axle fixture with the cost reduced and to firmly fix the axle at the center of a shell.

To achieve the above purpose, the present invention is an axle fixture for a heat dissipation fan and a method of manufacture thereof, comprising steps of the followings: obtaining a shell having an axle; providing a lower mold having a platform covered by the shell; obtaining an upper mold to cover the upper mold on the shell; and pouring a fixing agent from a sprue on the upper mold so that the axle can be firmly fixed at the center of the shell after the fixing agent is solidified. By doing so, an axle fixture for heat dissipation fan can be easily manufactured; the cost can be reduced; and the axle can be firmly fixed at the center of the shell.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be better understood from the following detailed description of the preferred embodiment of the present invention, taken in conjunction with the accompanying drawings, in which

FIG. 1 is a view showing the assembling of a shell and an axle according to an embodiment of the present invention;

FIG. 2 is a view showing step a of the manufacturing method according to an embodiment of the present invention;

FIG. 3 is a view showing step b of the manufacturing method according to an embodiment of the present invention;

FIG. 4 is a view showing step c of the manufacturing method according to an embodiment of the present invention;

FIG. 5 is a view showing step d of the manufacturing method according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a final product made with the manufacturing method according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the product before manufacturing according to an embodiment of the prior art; and

FIG. 8 is a cross-sectional view of the product after manufacturing according to an embodiment of the prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The following descriptions of the preferred embodiments are provided to understand the features and the structures of the present invention.

Please refer to FIG. 1 through FIG. 6, which, according to an embodiment of the present invention, are a view showing an assembling of a shell and an axle, views showing step a to step d of a manufacturing method, and a cross-sectional view of a final product made with the manufacturing method.

As shown in FIG. 6, the present invention is an axle fixture for heat dissipation fan, comprising a shell 1, an axle 13 and a fixture part 41. The shell 1 comprises a depression 11 at center where a punch hole 12 is deposed at the center of the depression 11 and a plurality of rabbets 14 is deposed on the depression 11 around the punch hole 12 but not connected to the punch hole 12. The axle 13 is located in the punch hole 12 where an acanthoid surface part 13 is deposed on the axle 13 near the shell 1. The fixture part 41 can be made of a material of zinc and is located at the depression 11 while covering around the acanthoid surface part 13 to make the axle 13 tightly fixed at the center of the shell 1.

A method for manufacturing the above axle fixture for heat dissipation fan comprises steps of the followings:

Step A—As shown in FIG. 1 and FIG. 2, a shell 1 having a depression 11 at center is obtained, where a punch hole 12 is deposed at the center 11 and an axle 13 is located in the punch hole 12. And, an acanthoid surface part 131 is deposed on the axle 13 near the shell 1; and a plurality of rabbets 14 is deposed on the depression 11 around the axle 13 but not connected to the axle 13.

Step B—As shown in FIG. 3, a lower mold 2 having a platform 21 with a concave 22 at center is provided, where the platform 21 is covered by the shell 1 as the concave 22 is corresponding to the rabbets 14. And, a long hollow 23 is located in the platform 21 to contain the axle 13 as connecting to the concave 22.

Step C—As shown in FIG. 4, an upper mold 3 with at least one sprue 31 is obtained to cover the shell 1, where the sprue 31 is corresponding to the rabbets 14 or somewhere around them but not corresponding to the axle 13. And, the number of sprue 31 can be plural as required.

Step D—As shown in FIG. 5, a fixing agent 4, which can be made of a material of zinc, is poured into the concave 21 of the lower mold 2 from the sprue 31 of the upper mold 3 through the guiding of the rabbets 14. Because the sprue 31 is not corresponding to the axle 13 and because the fixing agent 4 is guided by the rabbets 14 to flow to the concave 21 around the outside of the axle 13, the axle 13 will not be slanted.

Step E—Please further refer to FIG. 6, after the fixing agent is solidified, a fixture part 41 is formed between the shell 1 and the axle 13 by the concave 21 so that the axle 13 is firmly fixed at the center of the shell 1. Because the fixture part 41 is covered and is firmly fixed on the acanthoid surface part 131 of the axle 13, the axle 13 is firmly fixed at the center of the shell. In the end, the upper mold 3 and the lower mold 2 are stripped off.

Accordingly, by the above steps, an axle fixture for heat dissipation fan is obtained. As a result, according to the present invention, an axle can be firmly fixed at the center of a shell by the axle fixture obtained. Besides, because the fixing agent can be made of a material of zinc, the manufacture can be easier and the cost can be reduced.

The preferred embodiments herein disclosed are not intended to unnecessarily limit the scope of the invention. Therefore, simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention. 

1. A method for manufacturing an axle fixture for heat dissipation fan, comprising steps of: Step A—obtaining a shell with an axle at center; Step B—obtaining a lower mold with a platform covered by said shell; Step C—obtaining an upper mold with at least one sprue and covering said upper mold on said shell; Step D—pouring a fixing agent from said sprue and fixing said axle at the center of said shell with the solidifying of said fixing agent; and Step E—stripping off said upper mold and said lower mold.
 2. The method according to claim 1, wherein a depression with a punch hole at center is deposed at the center of said shell as locating said axle in said punch hole; and wherein a plurality of rabbets is deposed on said depression around said axle but not connected to said axle.
 3. The method according to claim 1, wherein an acanthoid surface part is deposed on said axle near said shell and is tightly covered with said fixing agent after said fixing agent is solidified.
 4. The method according to claim 1, wherein a concave is located at the center of said platform and a long hollow containing said axle is located in said platform and is connected to said concave.
 5. The method according to claim 1, wherein said fixing agent is made of a material of zinc.
 6. A method for manufacturing an axle fixture for heat dissipation fan, comprising steps of: Step A—obtaining a shell having a depression at center, wherein said depression comprises an axle at center and a plurality of rabbets is deposed on said depression around said axle but not connected to said axle; Step B—obtaining a lower mold having a platform with a concave at center, wherein said lower mold is covered by said shell and said concave is corresponding to said rabbets; Step C—obtaining an upper mold covering said shell, where at least one sprue on said upper mold is corresponding to said depression but not to said axle; Step D—pouring a fixing agent from said sprue and, after said fixing agent is solidified, forming a fixture part between said shell and said axle in said concave, wherein said fixing agent is guided by said plurality of rabbets to flow into said concave and wherein said axle is fixed at the center of said shell; and Step E—stripping off said upper mold and said lower mold.
 7. The method according to claim 6, wherein a punch hole is deposed on said depression while said axle is located in said punch hole.
 8. The method according to claim 6, wherein an acanthoid surface part is deposed on said axle near said shell and is tightly covered with said fixing agent after said fixing agent is solidified.
 9. The method according to claim 6, wherein a long hollow containing said axle is located in said platform as connecting to said concave.
 10. The method according to claim 6, wherein said fixing agent is made of a material of zinc.
 11. An axle fixture for heat dissipation fan, comprising: a shell with a depression at center, wherein a punch hole is deposed at the center of said depression and a plurality of rabbets is deposed on said depression around said punch hole but not connected to said punch hole; an axle located in said punch hole, wherein an acanthoid surface part is deposed on said axle near said shell; and a fixture part located at said depression wherein said fixture part tightly covers said acanthoid surface part and said axle is fixed on said shell by said fixture part.
 12. The method according to claim 11, wherein said fixture part is made of a material of zinc. 